If the IPCC good practice guidance provides an uncertainty range for a component, this range for that component is used; If the IPCC good practice guidance provides an uncertainty range for emissions from a particular source or a combined uncertainty range can be calculated from the uncertainty values and/or ranges of the input parameters using the tier 1 method, the range generated by applying the uncertainty value for the source is used; In cases where the IPCC good practice guidance does not provide an uncertainty range for an estimate or a combined uncertainty range cannot be calculated because necessary information is not available, an assessed uncertainty range determined by expert judgement for the purposes of this guidance is used.
b) Si en la Orientación del IPCC sobre las buenas prácticas figura un margen de incertidumbre para las emisiones de una fuente determinada o si se puede calcular un margen de incertidumbre combinado a partir de los valores y/o márgenes de incertidumbre de los parámetros de entrada utilizando el método del nivel 1, se utilizará el margen generado mediante la aplicación del valor de incertidumbre para esa fuente;